1 /* 2 * fs/f2fs/f2fs.h 3 * 4 * Copyright (c) 2012 Samsung Electronics Co., Ltd. 5 * http://www.samsung.com/ 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License version 2 as 9 * published by the Free Software Foundation. 10 */ 11 #ifndef _LINUX_F2FS_H 12 #define _LINUX_F2FS_H 13 14 #include <linux/types.h> 15 #include <linux/page-flags.h> 16 #include <linux/buffer_head.h> 17 #include <linux/slab.h> 18 #include <linux/crc32.h> 19 #include <linux/magic.h> 20 #include <linux/kobject.h> 21 22 /* 23 * For mount options 24 */ 25 #define F2FS_MOUNT_BG_GC 0x00000001 26 #define F2FS_MOUNT_DISABLE_ROLL_FORWARD 0x00000002 27 #define F2FS_MOUNT_DISCARD 0x00000004 28 #define F2FS_MOUNT_NOHEAP 0x00000008 29 #define F2FS_MOUNT_XATTR_USER 0x00000010 30 #define F2FS_MOUNT_POSIX_ACL 0x00000020 31 #define F2FS_MOUNT_DISABLE_EXT_IDENTIFY 0x00000040 32 #define F2FS_MOUNT_INLINE_XATTR 0x00000080 33 34 #define clear_opt(sbi, option) (sbi->mount_opt.opt &= ~F2FS_MOUNT_##option) 35 #define set_opt(sbi, option) (sbi->mount_opt.opt |= F2FS_MOUNT_##option) 36 #define test_opt(sbi, option) (sbi->mount_opt.opt & F2FS_MOUNT_##option) 37 38 #define ver_after(a, b) (typecheck(unsigned long long, a) && \ 39 typecheck(unsigned long long, b) && \ 40 ((long long)((a) - (b)) > 0)) 41 42 typedef u32 block_t; /* 43 * should not change u32, since it is the on-disk block 44 * address format, __le32. 45 */ 46 typedef u32 nid_t; 47 48 struct f2fs_mount_info { 49 unsigned int opt; 50 }; 51 52 #define CRCPOLY_LE 0xedb88320 53 54 static inline __u32 f2fs_crc32(void *buf, size_t len) 55 { 56 unsigned char *p = (unsigned char *)buf; 57 __u32 crc = F2FS_SUPER_MAGIC; 58 int i; 59 60 while (len--) { 61 crc ^= *p++; 62 for (i = 0; i < 8; i++) 63 crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0); 64 } 65 return crc; 66 } 67 68 static inline bool f2fs_crc_valid(__u32 blk_crc, void *buf, size_t buf_size) 69 { 70 return f2fs_crc32(buf, buf_size) == blk_crc; 71 } 72 73 /* 74 * For checkpoint manager 75 */ 76 enum { 77 NAT_BITMAP, 78 SIT_BITMAP 79 }; 80 81 /* for the list of orphan inodes */ 82 struct orphan_inode_entry { 83 struct list_head list; /* list head */ 84 nid_t ino; /* inode number */ 85 }; 86 87 /* for the list of directory inodes */ 88 struct dir_inode_entry { 89 struct list_head list; /* list head */ 90 struct inode *inode; /* vfs inode pointer */ 91 }; 92 93 /* for the list of fsync inodes, used only during recovery */ 94 struct fsync_inode_entry { 95 struct list_head list; /* list head */ 96 struct inode *inode; /* vfs inode pointer */ 97 block_t blkaddr; /* block address locating the last inode */ 98 }; 99 100 #define nats_in_cursum(sum) (le16_to_cpu(sum->n_nats)) 101 #define sits_in_cursum(sum) (le16_to_cpu(sum->n_sits)) 102 103 #define nat_in_journal(sum, i) (sum->nat_j.entries[i].ne) 104 #define nid_in_journal(sum, i) (sum->nat_j.entries[i].nid) 105 #define sit_in_journal(sum, i) (sum->sit_j.entries[i].se) 106 #define segno_in_journal(sum, i) (sum->sit_j.entries[i].segno) 107 108 static inline int update_nats_in_cursum(struct f2fs_summary_block *rs, int i) 109 { 110 int before = nats_in_cursum(rs); 111 rs->n_nats = cpu_to_le16(before + i); 112 return before; 113 } 114 115 static inline int update_sits_in_cursum(struct f2fs_summary_block *rs, int i) 116 { 117 int before = sits_in_cursum(rs); 118 rs->n_sits = cpu_to_le16(before + i); 119 return before; 120 } 121 122 /* 123 * ioctl commands 124 */ 125 #define F2FS_IOC_GETFLAGS FS_IOC_GETFLAGS 126 #define F2FS_IOC_SETFLAGS FS_IOC_SETFLAGS 127 128 #if defined(__KERNEL__) && defined(CONFIG_COMPAT) 129 /* 130 * ioctl commands in 32 bit emulation 131 */ 132 #define F2FS_IOC32_GETFLAGS FS_IOC32_GETFLAGS 133 #define F2FS_IOC32_SETFLAGS FS_IOC32_SETFLAGS 134 #endif 135 136 /* 137 * For INODE and NODE manager 138 */ 139 /* 140 * XATTR_NODE_OFFSET stores xattrs to one node block per file keeping -1 141 * as its node offset to distinguish from index node blocks. 142 * But some bits are used to mark the node block. 143 */ 144 #define XATTR_NODE_OFFSET ((((unsigned int)-1) << OFFSET_BIT_SHIFT) \ 145 >> OFFSET_BIT_SHIFT) 146 enum { 147 ALLOC_NODE, /* allocate a new node page if needed */ 148 LOOKUP_NODE, /* look up a node without readahead */ 149 LOOKUP_NODE_RA, /* 150 * look up a node with readahead called 151 * by get_datablock_ro. 152 */ 153 }; 154 155 #define F2FS_LINK_MAX 32000 /* maximum link count per file */ 156 157 /* for in-memory extent cache entry */ 158 struct extent_info { 159 rwlock_t ext_lock; /* rwlock for consistency */ 160 unsigned int fofs; /* start offset in a file */ 161 u32 blk_addr; /* start block address of the extent */ 162 unsigned int len; /* length of the extent */ 163 }; 164 165 /* 166 * i_advise uses FADVISE_XXX_BIT. We can add additional hints later. 167 */ 168 #define FADVISE_COLD_BIT 0x01 169 #define FADVISE_LOST_PINO_BIT 0x02 170 171 struct f2fs_inode_info { 172 struct inode vfs_inode; /* serve a vfs inode */ 173 unsigned long i_flags; /* keep an inode flags for ioctl */ 174 unsigned char i_advise; /* use to give file attribute hints */ 175 unsigned int i_current_depth; /* use only in directory structure */ 176 unsigned int i_pino; /* parent inode number */ 177 umode_t i_acl_mode; /* keep file acl mode temporarily */ 178 179 /* Use below internally in f2fs*/ 180 unsigned long flags; /* use to pass per-file flags */ 181 atomic_t dirty_dents; /* # of dirty dentry pages */ 182 f2fs_hash_t chash; /* hash value of given file name */ 183 unsigned int clevel; /* maximum level of given file name */ 184 nid_t i_xattr_nid; /* node id that contains xattrs */ 185 unsigned long long xattr_ver; /* cp version of xattr modification */ 186 struct extent_info ext; /* in-memory extent cache entry */ 187 }; 188 189 static inline void get_extent_info(struct extent_info *ext, 190 struct f2fs_extent i_ext) 191 { 192 write_lock(&ext->ext_lock); 193 ext->fofs = le32_to_cpu(i_ext.fofs); 194 ext->blk_addr = le32_to_cpu(i_ext.blk_addr); 195 ext->len = le32_to_cpu(i_ext.len); 196 write_unlock(&ext->ext_lock); 197 } 198 199 static inline void set_raw_extent(struct extent_info *ext, 200 struct f2fs_extent *i_ext) 201 { 202 read_lock(&ext->ext_lock); 203 i_ext->fofs = cpu_to_le32(ext->fofs); 204 i_ext->blk_addr = cpu_to_le32(ext->blk_addr); 205 i_ext->len = cpu_to_le32(ext->len); 206 read_unlock(&ext->ext_lock); 207 } 208 209 struct f2fs_nm_info { 210 block_t nat_blkaddr; /* base disk address of NAT */ 211 nid_t max_nid; /* maximum possible node ids */ 212 nid_t next_scan_nid; /* the next nid to be scanned */ 213 214 /* NAT cache management */ 215 struct radix_tree_root nat_root;/* root of the nat entry cache */ 216 rwlock_t nat_tree_lock; /* protect nat_tree_lock */ 217 unsigned int nat_cnt; /* the # of cached nat entries */ 218 struct list_head nat_entries; /* cached nat entry list (clean) */ 219 struct list_head dirty_nat_entries; /* cached nat entry list (dirty) */ 220 221 /* free node ids management */ 222 struct list_head free_nid_list; /* a list for free nids */ 223 spinlock_t free_nid_list_lock; /* protect free nid list */ 224 unsigned int fcnt; /* the number of free node id */ 225 struct mutex build_lock; /* lock for build free nids */ 226 227 /* for checkpoint */ 228 char *nat_bitmap; /* NAT bitmap pointer */ 229 int bitmap_size; /* bitmap size */ 230 }; 231 232 /* 233 * this structure is used as one of function parameters. 234 * all the information are dedicated to a given direct node block determined 235 * by the data offset in a file. 236 */ 237 struct dnode_of_data { 238 struct inode *inode; /* vfs inode pointer */ 239 struct page *inode_page; /* its inode page, NULL is possible */ 240 struct page *node_page; /* cached direct node page */ 241 nid_t nid; /* node id of the direct node block */ 242 unsigned int ofs_in_node; /* data offset in the node page */ 243 bool inode_page_locked; /* inode page is locked or not */ 244 block_t data_blkaddr; /* block address of the node block */ 245 }; 246 247 static inline void set_new_dnode(struct dnode_of_data *dn, struct inode *inode, 248 struct page *ipage, struct page *npage, nid_t nid) 249 { 250 memset(dn, 0, sizeof(*dn)); 251 dn->inode = inode; 252 dn->inode_page = ipage; 253 dn->node_page = npage; 254 dn->nid = nid; 255 } 256 257 /* 258 * For SIT manager 259 * 260 * By default, there are 6 active log areas across the whole main area. 261 * When considering hot and cold data separation to reduce cleaning overhead, 262 * we split 3 for data logs and 3 for node logs as hot, warm, and cold types, 263 * respectively. 264 * In the current design, you should not change the numbers intentionally. 265 * Instead, as a mount option such as active_logs=x, you can use 2, 4, and 6 266 * logs individually according to the underlying devices. (default: 6) 267 * Just in case, on-disk layout covers maximum 16 logs that consist of 8 for 268 * data and 8 for node logs. 269 */ 270 #define NR_CURSEG_DATA_TYPE (3) 271 #define NR_CURSEG_NODE_TYPE (3) 272 #define NR_CURSEG_TYPE (NR_CURSEG_DATA_TYPE + NR_CURSEG_NODE_TYPE) 273 274 enum { 275 CURSEG_HOT_DATA = 0, /* directory entry blocks */ 276 CURSEG_WARM_DATA, /* data blocks */ 277 CURSEG_COLD_DATA, /* multimedia or GCed data blocks */ 278 CURSEG_HOT_NODE, /* direct node blocks of directory files */ 279 CURSEG_WARM_NODE, /* direct node blocks of normal files */ 280 CURSEG_COLD_NODE, /* indirect node blocks */ 281 NO_CHECK_TYPE 282 }; 283 284 struct f2fs_sm_info { 285 struct sit_info *sit_info; /* whole segment information */ 286 struct free_segmap_info *free_info; /* free segment information */ 287 struct dirty_seglist_info *dirty_info; /* dirty segment information */ 288 struct curseg_info *curseg_array; /* active segment information */ 289 290 struct list_head wblist_head; /* list of under-writeback pages */ 291 spinlock_t wblist_lock; /* lock for checkpoint */ 292 293 block_t seg0_blkaddr; /* block address of 0'th segment */ 294 block_t main_blkaddr; /* start block address of main area */ 295 block_t ssa_blkaddr; /* start block address of SSA area */ 296 297 unsigned int segment_count; /* total # of segments */ 298 unsigned int main_segments; /* # of segments in main area */ 299 unsigned int reserved_segments; /* # of reserved segments */ 300 unsigned int ovp_segments; /* # of overprovision segments */ 301 }; 302 303 /* 304 * For superblock 305 */ 306 /* 307 * COUNT_TYPE for monitoring 308 * 309 * f2fs monitors the number of several block types such as on-writeback, 310 * dirty dentry blocks, dirty node blocks, and dirty meta blocks. 311 */ 312 enum count_type { 313 F2FS_WRITEBACK, 314 F2FS_DIRTY_DENTS, 315 F2FS_DIRTY_NODES, 316 F2FS_DIRTY_META, 317 NR_COUNT_TYPE, 318 }; 319 320 /* 321 * Uses as sbi->fs_lock[NR_GLOBAL_LOCKS]. 322 * The checkpoint procedure blocks all the locks in this fs_lock array. 323 * Some FS operations grab free locks, and if there is no free lock, 324 * then wait to grab a lock in a round-robin manner. 325 */ 326 #define NR_GLOBAL_LOCKS 8 327 328 /* 329 * The below are the page types of bios used in submti_bio(). 330 * The available types are: 331 * DATA User data pages. It operates as async mode. 332 * NODE Node pages. It operates as async mode. 333 * META FS metadata pages such as SIT, NAT, CP. 334 * NR_PAGE_TYPE The number of page types. 335 * META_FLUSH Make sure the previous pages are written 336 * with waiting the bio's completion 337 * ... Only can be used with META. 338 */ 339 enum page_type { 340 DATA, 341 NODE, 342 META, 343 NR_PAGE_TYPE, 344 META_FLUSH, 345 }; 346 347 struct f2fs_sb_info { 348 struct super_block *sb; /* pointer to VFS super block */ 349 struct proc_dir_entry *s_proc; /* proc entry */ 350 struct buffer_head *raw_super_buf; /* buffer head of raw sb */ 351 struct f2fs_super_block *raw_super; /* raw super block pointer */ 352 int s_dirty; /* dirty flag for checkpoint */ 353 354 /* for node-related operations */ 355 struct f2fs_nm_info *nm_info; /* node manager */ 356 struct inode *node_inode; /* cache node blocks */ 357 358 /* for segment-related operations */ 359 struct f2fs_sm_info *sm_info; /* segment manager */ 360 struct bio *bio[NR_PAGE_TYPE]; /* bios to merge */ 361 sector_t last_block_in_bio[NR_PAGE_TYPE]; /* last block number */ 362 struct rw_semaphore bio_sem; /* IO semaphore */ 363 364 /* for checkpoint */ 365 struct f2fs_checkpoint *ckpt; /* raw checkpoint pointer */ 366 struct inode *meta_inode; /* cache meta blocks */ 367 struct mutex cp_mutex; /* checkpoint procedure lock */ 368 struct mutex fs_lock[NR_GLOBAL_LOCKS]; /* blocking FS operations */ 369 struct mutex node_write; /* locking node writes */ 370 struct mutex writepages; /* mutex for writepages() */ 371 unsigned char next_lock_num; /* round-robin global locks */ 372 int por_doing; /* recovery is doing or not */ 373 int on_build_free_nids; /* build_free_nids is doing */ 374 375 /* for orphan inode management */ 376 struct list_head orphan_inode_list; /* orphan inode list */ 377 struct mutex orphan_inode_mutex; /* for orphan inode list */ 378 unsigned int n_orphans; /* # of orphan inodes */ 379 380 /* for directory inode management */ 381 struct list_head dir_inode_list; /* dir inode list */ 382 spinlock_t dir_inode_lock; /* for dir inode list lock */ 383 384 /* basic file system units */ 385 unsigned int log_sectors_per_block; /* log2 sectors per block */ 386 unsigned int log_blocksize; /* log2 block size */ 387 unsigned int blocksize; /* block size */ 388 unsigned int root_ino_num; /* root inode number*/ 389 unsigned int node_ino_num; /* node inode number*/ 390 unsigned int meta_ino_num; /* meta inode number*/ 391 unsigned int log_blocks_per_seg; /* log2 blocks per segment */ 392 unsigned int blocks_per_seg; /* blocks per segment */ 393 unsigned int segs_per_sec; /* segments per section */ 394 unsigned int secs_per_zone; /* sections per zone */ 395 unsigned int total_sections; /* total section count */ 396 unsigned int total_node_count; /* total node block count */ 397 unsigned int total_valid_node_count; /* valid node block count */ 398 unsigned int total_valid_inode_count; /* valid inode count */ 399 int active_logs; /* # of active logs */ 400 401 block_t user_block_count; /* # of user blocks */ 402 block_t total_valid_block_count; /* # of valid blocks */ 403 block_t alloc_valid_block_count; /* # of allocated blocks */ 404 block_t last_valid_block_count; /* for recovery */ 405 u32 s_next_generation; /* for NFS support */ 406 atomic_t nr_pages[NR_COUNT_TYPE]; /* # of pages, see count_type */ 407 408 struct f2fs_mount_info mount_opt; /* mount options */ 409 410 /* for cleaning operations */ 411 struct mutex gc_mutex; /* mutex for GC */ 412 struct f2fs_gc_kthread *gc_thread; /* GC thread */ 413 unsigned int cur_victim_sec; /* current victim section num */ 414 415 /* 416 * for stat information. 417 * one is for the LFS mode, and the other is for the SSR mode. 418 */ 419 #ifdef CONFIG_F2FS_STAT_FS 420 struct f2fs_stat_info *stat_info; /* FS status information */ 421 unsigned int segment_count[2]; /* # of allocated segments */ 422 unsigned int block_count[2]; /* # of allocated blocks */ 423 int total_hit_ext, read_hit_ext; /* extent cache hit ratio */ 424 int bg_gc; /* background gc calls */ 425 unsigned int n_dirty_dirs; /* # of dir inodes */ 426 #endif 427 unsigned int last_victim[2]; /* last victim segment # */ 428 spinlock_t stat_lock; /* lock for stat operations */ 429 430 /* For sysfs suppport */ 431 struct kobject s_kobj; 432 struct completion s_kobj_unregister; 433 }; 434 435 /* 436 * Inline functions 437 */ 438 static inline struct f2fs_inode_info *F2FS_I(struct inode *inode) 439 { 440 return container_of(inode, struct f2fs_inode_info, vfs_inode); 441 } 442 443 static inline struct f2fs_sb_info *F2FS_SB(struct super_block *sb) 444 { 445 return sb->s_fs_info; 446 } 447 448 static inline struct f2fs_super_block *F2FS_RAW_SUPER(struct f2fs_sb_info *sbi) 449 { 450 return (struct f2fs_super_block *)(sbi->raw_super); 451 } 452 453 static inline struct f2fs_checkpoint *F2FS_CKPT(struct f2fs_sb_info *sbi) 454 { 455 return (struct f2fs_checkpoint *)(sbi->ckpt); 456 } 457 458 static inline struct f2fs_node *F2FS_NODE(struct page *page) 459 { 460 return (struct f2fs_node *)page_address(page); 461 } 462 463 static inline struct f2fs_nm_info *NM_I(struct f2fs_sb_info *sbi) 464 { 465 return (struct f2fs_nm_info *)(sbi->nm_info); 466 } 467 468 static inline struct f2fs_sm_info *SM_I(struct f2fs_sb_info *sbi) 469 { 470 return (struct f2fs_sm_info *)(sbi->sm_info); 471 } 472 473 static inline struct sit_info *SIT_I(struct f2fs_sb_info *sbi) 474 { 475 return (struct sit_info *)(SM_I(sbi)->sit_info); 476 } 477 478 static inline struct free_segmap_info *FREE_I(struct f2fs_sb_info *sbi) 479 { 480 return (struct free_segmap_info *)(SM_I(sbi)->free_info); 481 } 482 483 static inline struct dirty_seglist_info *DIRTY_I(struct f2fs_sb_info *sbi) 484 { 485 return (struct dirty_seglist_info *)(SM_I(sbi)->dirty_info); 486 } 487 488 static inline void F2FS_SET_SB_DIRT(struct f2fs_sb_info *sbi) 489 { 490 sbi->s_dirty = 1; 491 } 492 493 static inline void F2FS_RESET_SB_DIRT(struct f2fs_sb_info *sbi) 494 { 495 sbi->s_dirty = 0; 496 } 497 498 static inline unsigned long long cur_cp_version(struct f2fs_checkpoint *cp) 499 { 500 return le64_to_cpu(cp->checkpoint_ver); 501 } 502 503 static inline bool is_set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f) 504 { 505 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags); 506 return ckpt_flags & f; 507 } 508 509 static inline void set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f) 510 { 511 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags); 512 ckpt_flags |= f; 513 cp->ckpt_flags = cpu_to_le32(ckpt_flags); 514 } 515 516 static inline void clear_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f) 517 { 518 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags); 519 ckpt_flags &= (~f); 520 cp->ckpt_flags = cpu_to_le32(ckpt_flags); 521 } 522 523 static inline void mutex_lock_all(struct f2fs_sb_info *sbi) 524 { 525 int i; 526 527 for (i = 0; i < NR_GLOBAL_LOCKS; i++) { 528 /* 529 * This is the only time we take multiple fs_lock[] 530 * instances; the order is immaterial since we 531 * always hold cp_mutex, which serializes multiple 532 * such operations. 533 */ 534 mutex_lock_nest_lock(&sbi->fs_lock[i], &sbi->cp_mutex); 535 } 536 } 537 538 static inline void mutex_unlock_all(struct f2fs_sb_info *sbi) 539 { 540 int i = 0; 541 for (; i < NR_GLOBAL_LOCKS; i++) 542 mutex_unlock(&sbi->fs_lock[i]); 543 } 544 545 static inline int mutex_lock_op(struct f2fs_sb_info *sbi) 546 { 547 unsigned char next_lock = sbi->next_lock_num % NR_GLOBAL_LOCKS; 548 int i = 0; 549 550 for (; i < NR_GLOBAL_LOCKS; i++) 551 if (mutex_trylock(&sbi->fs_lock[i])) 552 return i; 553 554 mutex_lock(&sbi->fs_lock[next_lock]); 555 sbi->next_lock_num++; 556 return next_lock; 557 } 558 559 static inline void mutex_unlock_op(struct f2fs_sb_info *sbi, int ilock) 560 { 561 if (ilock < 0) 562 return; 563 BUG_ON(ilock >= NR_GLOBAL_LOCKS); 564 mutex_unlock(&sbi->fs_lock[ilock]); 565 } 566 567 /* 568 * Check whether the given nid is within node id range. 569 */ 570 static inline int check_nid_range(struct f2fs_sb_info *sbi, nid_t nid) 571 { 572 WARN_ON((nid >= NM_I(sbi)->max_nid)); 573 if (nid >= NM_I(sbi)->max_nid) 574 return -EINVAL; 575 return 0; 576 } 577 578 #define F2FS_DEFAULT_ALLOCATED_BLOCKS 1 579 580 /* 581 * Check whether the inode has blocks or not 582 */ 583 static inline int F2FS_HAS_BLOCKS(struct inode *inode) 584 { 585 if (F2FS_I(inode)->i_xattr_nid) 586 return (inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS + 1); 587 else 588 return (inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS); 589 } 590 591 static inline bool inc_valid_block_count(struct f2fs_sb_info *sbi, 592 struct inode *inode, blkcnt_t count) 593 { 594 block_t valid_block_count; 595 596 spin_lock(&sbi->stat_lock); 597 valid_block_count = 598 sbi->total_valid_block_count + (block_t)count; 599 if (valid_block_count > sbi->user_block_count) { 600 spin_unlock(&sbi->stat_lock); 601 return false; 602 } 603 inode->i_blocks += count; 604 sbi->total_valid_block_count = valid_block_count; 605 sbi->alloc_valid_block_count += (block_t)count; 606 spin_unlock(&sbi->stat_lock); 607 return true; 608 } 609 610 static inline int dec_valid_block_count(struct f2fs_sb_info *sbi, 611 struct inode *inode, 612 blkcnt_t count) 613 { 614 spin_lock(&sbi->stat_lock); 615 BUG_ON(sbi->total_valid_block_count < (block_t) count); 616 BUG_ON(inode->i_blocks < count); 617 inode->i_blocks -= count; 618 sbi->total_valid_block_count -= (block_t)count; 619 spin_unlock(&sbi->stat_lock); 620 return 0; 621 } 622 623 static inline void inc_page_count(struct f2fs_sb_info *sbi, int count_type) 624 { 625 atomic_inc(&sbi->nr_pages[count_type]); 626 F2FS_SET_SB_DIRT(sbi); 627 } 628 629 static inline void inode_inc_dirty_dents(struct inode *inode) 630 { 631 atomic_inc(&F2FS_I(inode)->dirty_dents); 632 } 633 634 static inline void dec_page_count(struct f2fs_sb_info *sbi, int count_type) 635 { 636 atomic_dec(&sbi->nr_pages[count_type]); 637 } 638 639 static inline void inode_dec_dirty_dents(struct inode *inode) 640 { 641 atomic_dec(&F2FS_I(inode)->dirty_dents); 642 } 643 644 static inline int get_pages(struct f2fs_sb_info *sbi, int count_type) 645 { 646 return atomic_read(&sbi->nr_pages[count_type]); 647 } 648 649 static inline int get_blocktype_secs(struct f2fs_sb_info *sbi, int block_type) 650 { 651 unsigned int pages_per_sec = sbi->segs_per_sec * 652 (1 << sbi->log_blocks_per_seg); 653 return ((get_pages(sbi, block_type) + pages_per_sec - 1) 654 >> sbi->log_blocks_per_seg) / sbi->segs_per_sec; 655 } 656 657 static inline block_t valid_user_blocks(struct f2fs_sb_info *sbi) 658 { 659 block_t ret; 660 spin_lock(&sbi->stat_lock); 661 ret = sbi->total_valid_block_count; 662 spin_unlock(&sbi->stat_lock); 663 return ret; 664 } 665 666 static inline unsigned long __bitmap_size(struct f2fs_sb_info *sbi, int flag) 667 { 668 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); 669 670 /* return NAT or SIT bitmap */ 671 if (flag == NAT_BITMAP) 672 return le32_to_cpu(ckpt->nat_ver_bitmap_bytesize); 673 else if (flag == SIT_BITMAP) 674 return le32_to_cpu(ckpt->sit_ver_bitmap_bytesize); 675 676 return 0; 677 } 678 679 static inline void *__bitmap_ptr(struct f2fs_sb_info *sbi, int flag) 680 { 681 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); 682 int offset = (flag == NAT_BITMAP) ? 683 le32_to_cpu(ckpt->sit_ver_bitmap_bytesize) : 0; 684 return &ckpt->sit_nat_version_bitmap + offset; 685 } 686 687 static inline block_t __start_cp_addr(struct f2fs_sb_info *sbi) 688 { 689 block_t start_addr; 690 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); 691 unsigned long long ckpt_version = cur_cp_version(ckpt); 692 693 start_addr = le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_blkaddr); 694 695 /* 696 * odd numbered checkpoint should at cp segment 0 697 * and even segent must be at cp segment 1 698 */ 699 if (!(ckpt_version & 1)) 700 start_addr += sbi->blocks_per_seg; 701 702 return start_addr; 703 } 704 705 static inline block_t __start_sum_addr(struct f2fs_sb_info *sbi) 706 { 707 return le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum); 708 } 709 710 static inline bool inc_valid_node_count(struct f2fs_sb_info *sbi, 711 struct inode *inode, 712 unsigned int count) 713 { 714 block_t valid_block_count; 715 unsigned int valid_node_count; 716 717 spin_lock(&sbi->stat_lock); 718 719 valid_block_count = sbi->total_valid_block_count + (block_t)count; 720 sbi->alloc_valid_block_count += (block_t)count; 721 valid_node_count = sbi->total_valid_node_count + count; 722 723 if (valid_block_count > sbi->user_block_count) { 724 spin_unlock(&sbi->stat_lock); 725 return false; 726 } 727 728 if (valid_node_count > sbi->total_node_count) { 729 spin_unlock(&sbi->stat_lock); 730 return false; 731 } 732 733 if (inode) 734 inode->i_blocks += count; 735 sbi->total_valid_node_count = valid_node_count; 736 sbi->total_valid_block_count = valid_block_count; 737 spin_unlock(&sbi->stat_lock); 738 739 return true; 740 } 741 742 static inline void dec_valid_node_count(struct f2fs_sb_info *sbi, 743 struct inode *inode, 744 unsigned int count) 745 { 746 spin_lock(&sbi->stat_lock); 747 748 BUG_ON(sbi->total_valid_block_count < count); 749 BUG_ON(sbi->total_valid_node_count < count); 750 BUG_ON(inode->i_blocks < count); 751 752 inode->i_blocks -= count; 753 sbi->total_valid_node_count -= count; 754 sbi->total_valid_block_count -= (block_t)count; 755 756 spin_unlock(&sbi->stat_lock); 757 } 758 759 static inline unsigned int valid_node_count(struct f2fs_sb_info *sbi) 760 { 761 unsigned int ret; 762 spin_lock(&sbi->stat_lock); 763 ret = sbi->total_valid_node_count; 764 spin_unlock(&sbi->stat_lock); 765 return ret; 766 } 767 768 static inline void inc_valid_inode_count(struct f2fs_sb_info *sbi) 769 { 770 spin_lock(&sbi->stat_lock); 771 BUG_ON(sbi->total_valid_inode_count == sbi->total_node_count); 772 sbi->total_valid_inode_count++; 773 spin_unlock(&sbi->stat_lock); 774 } 775 776 static inline int dec_valid_inode_count(struct f2fs_sb_info *sbi) 777 { 778 spin_lock(&sbi->stat_lock); 779 BUG_ON(!sbi->total_valid_inode_count); 780 sbi->total_valid_inode_count--; 781 spin_unlock(&sbi->stat_lock); 782 return 0; 783 } 784 785 static inline unsigned int valid_inode_count(struct f2fs_sb_info *sbi) 786 { 787 unsigned int ret; 788 spin_lock(&sbi->stat_lock); 789 ret = sbi->total_valid_inode_count; 790 spin_unlock(&sbi->stat_lock); 791 return ret; 792 } 793 794 static inline void f2fs_put_page(struct page *page, int unlock) 795 { 796 if (!page || IS_ERR(page)) 797 return; 798 799 if (unlock) { 800 BUG_ON(!PageLocked(page)); 801 unlock_page(page); 802 } 803 page_cache_release(page); 804 } 805 806 static inline void f2fs_put_dnode(struct dnode_of_data *dn) 807 { 808 if (dn->node_page) 809 f2fs_put_page(dn->node_page, 1); 810 if (dn->inode_page && dn->node_page != dn->inode_page) 811 f2fs_put_page(dn->inode_page, 0); 812 dn->node_page = NULL; 813 dn->inode_page = NULL; 814 } 815 816 static inline struct kmem_cache *f2fs_kmem_cache_create(const char *name, 817 size_t size, void (*ctor)(void *)) 818 { 819 return kmem_cache_create(name, size, 0, SLAB_RECLAIM_ACCOUNT, ctor); 820 } 821 822 #define RAW_IS_INODE(p) ((p)->footer.nid == (p)->footer.ino) 823 824 static inline bool IS_INODE(struct page *page) 825 { 826 struct f2fs_node *p = F2FS_NODE(page); 827 return RAW_IS_INODE(p); 828 } 829 830 static inline __le32 *blkaddr_in_node(struct f2fs_node *node) 831 { 832 return RAW_IS_INODE(node) ? node->i.i_addr : node->dn.addr; 833 } 834 835 static inline block_t datablock_addr(struct page *node_page, 836 unsigned int offset) 837 { 838 struct f2fs_node *raw_node; 839 __le32 *addr_array; 840 raw_node = F2FS_NODE(node_page); 841 addr_array = blkaddr_in_node(raw_node); 842 return le32_to_cpu(addr_array[offset]); 843 } 844 845 static inline int f2fs_test_bit(unsigned int nr, char *addr) 846 { 847 int mask; 848 849 addr += (nr >> 3); 850 mask = 1 << (7 - (nr & 0x07)); 851 return mask & *addr; 852 } 853 854 static inline int f2fs_set_bit(unsigned int nr, char *addr) 855 { 856 int mask; 857 int ret; 858 859 addr += (nr >> 3); 860 mask = 1 << (7 - (nr & 0x07)); 861 ret = mask & *addr; 862 *addr |= mask; 863 return ret; 864 } 865 866 static inline int f2fs_clear_bit(unsigned int nr, char *addr) 867 { 868 int mask; 869 int ret; 870 871 addr += (nr >> 3); 872 mask = 1 << (7 - (nr & 0x07)); 873 ret = mask & *addr; 874 *addr &= ~mask; 875 return ret; 876 } 877 878 /* used for f2fs_inode_info->flags */ 879 enum { 880 FI_NEW_INODE, /* indicate newly allocated inode */ 881 FI_DIRTY_INODE, /* indicate inode is dirty or not */ 882 FI_INC_LINK, /* need to increment i_nlink */ 883 FI_ACL_MODE, /* indicate acl mode */ 884 FI_NO_ALLOC, /* should not allocate any blocks */ 885 FI_UPDATE_DIR, /* should update inode block for consistency */ 886 FI_DELAY_IPUT, /* used for the recovery */ 887 FI_INLINE_XATTR, /* used for inline xattr */ 888 }; 889 890 static inline void set_inode_flag(struct f2fs_inode_info *fi, int flag) 891 { 892 set_bit(flag, &fi->flags); 893 } 894 895 static inline int is_inode_flag_set(struct f2fs_inode_info *fi, int flag) 896 { 897 return test_bit(flag, &fi->flags); 898 } 899 900 static inline void clear_inode_flag(struct f2fs_inode_info *fi, int flag) 901 { 902 clear_bit(flag, &fi->flags); 903 } 904 905 static inline void set_acl_inode(struct f2fs_inode_info *fi, umode_t mode) 906 { 907 fi->i_acl_mode = mode; 908 set_inode_flag(fi, FI_ACL_MODE); 909 } 910 911 static inline int cond_clear_inode_flag(struct f2fs_inode_info *fi, int flag) 912 { 913 if (is_inode_flag_set(fi, FI_ACL_MODE)) { 914 clear_inode_flag(fi, FI_ACL_MODE); 915 return 1; 916 } 917 return 0; 918 } 919 920 static inline void get_inline_info(struct f2fs_inode_info *fi, 921 struct f2fs_inode *ri) 922 { 923 if (ri->i_inline & F2FS_INLINE_XATTR) 924 set_inode_flag(fi, FI_INLINE_XATTR); 925 } 926 927 static inline void set_raw_inline(struct f2fs_inode_info *fi, 928 struct f2fs_inode *ri) 929 { 930 ri->i_inline = 0; 931 932 if (is_inode_flag_set(fi, FI_INLINE_XATTR)) 933 ri->i_inline |= F2FS_INLINE_XATTR; 934 } 935 936 static inline unsigned int addrs_per_inode(struct f2fs_inode_info *fi) 937 { 938 if (is_inode_flag_set(fi, FI_INLINE_XATTR)) 939 return DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS; 940 return DEF_ADDRS_PER_INODE; 941 } 942 943 static inline void *inline_xattr_addr(struct page *page) 944 { 945 struct f2fs_inode *ri; 946 ri = (struct f2fs_inode *)page_address(page); 947 return (void *)&(ri->i_addr[DEF_ADDRS_PER_INODE - 948 F2FS_INLINE_XATTR_ADDRS]); 949 } 950 951 static inline int inline_xattr_size(struct inode *inode) 952 { 953 if (is_inode_flag_set(F2FS_I(inode), FI_INLINE_XATTR)) 954 return F2FS_INLINE_XATTR_ADDRS << 2; 955 else 956 return 0; 957 } 958 959 static inline int f2fs_readonly(struct super_block *sb) 960 { 961 return sb->s_flags & MS_RDONLY; 962 } 963 964 /* 965 * file.c 966 */ 967 int f2fs_sync_file(struct file *, loff_t, loff_t, int); 968 void truncate_data_blocks(struct dnode_of_data *); 969 void f2fs_truncate(struct inode *); 970 int f2fs_getattr(struct vfsmount *, struct dentry *, struct kstat *); 971 int f2fs_setattr(struct dentry *, struct iattr *); 972 int truncate_hole(struct inode *, pgoff_t, pgoff_t); 973 int truncate_data_blocks_range(struct dnode_of_data *, int); 974 long f2fs_ioctl(struct file *, unsigned int, unsigned long); 975 long f2fs_compat_ioctl(struct file *, unsigned int, unsigned long); 976 977 /* 978 * inode.c 979 */ 980 void f2fs_set_inode_flags(struct inode *); 981 struct inode *f2fs_iget(struct super_block *, unsigned long); 982 void update_inode(struct inode *, struct page *); 983 int update_inode_page(struct inode *); 984 int f2fs_write_inode(struct inode *, struct writeback_control *); 985 void f2fs_evict_inode(struct inode *); 986 987 /* 988 * namei.c 989 */ 990 struct dentry *f2fs_get_parent(struct dentry *child); 991 992 /* 993 * dir.c 994 */ 995 struct f2fs_dir_entry *f2fs_find_entry(struct inode *, struct qstr *, 996 struct page **); 997 struct f2fs_dir_entry *f2fs_parent_dir(struct inode *, struct page **); 998 ino_t f2fs_inode_by_name(struct inode *, struct qstr *); 999 void f2fs_set_link(struct inode *, struct f2fs_dir_entry *, 1000 struct page *, struct inode *); 1001 int update_dent_inode(struct inode *, const struct qstr *); 1002 int __f2fs_add_link(struct inode *, const struct qstr *, struct inode *); 1003 void f2fs_delete_entry(struct f2fs_dir_entry *, struct page *, struct inode *); 1004 int f2fs_make_empty(struct inode *, struct inode *); 1005 bool f2fs_empty_dir(struct inode *); 1006 1007 static inline int f2fs_add_link(struct dentry *dentry, struct inode *inode) 1008 { 1009 return __f2fs_add_link(dentry->d_parent->d_inode, &dentry->d_name, 1010 inode); 1011 } 1012 1013 /* 1014 * super.c 1015 */ 1016 int f2fs_sync_fs(struct super_block *, int); 1017 extern __printf(3, 4) 1018 void f2fs_msg(struct super_block *, const char *, const char *, ...); 1019 1020 /* 1021 * hash.c 1022 */ 1023 f2fs_hash_t f2fs_dentry_hash(const char *, size_t); 1024 1025 /* 1026 * node.c 1027 */ 1028 struct dnode_of_data; 1029 struct node_info; 1030 1031 int is_checkpointed_node(struct f2fs_sb_info *, nid_t); 1032 void get_node_info(struct f2fs_sb_info *, nid_t, struct node_info *); 1033 int get_dnode_of_data(struct dnode_of_data *, pgoff_t, int); 1034 int truncate_inode_blocks(struct inode *, pgoff_t); 1035 int truncate_xattr_node(struct inode *, struct page *); 1036 int remove_inode_page(struct inode *); 1037 struct page *new_inode_page(struct inode *, const struct qstr *); 1038 struct page *new_node_page(struct dnode_of_data *, unsigned int, struct page *); 1039 void ra_node_page(struct f2fs_sb_info *, nid_t); 1040 struct page *get_node_page(struct f2fs_sb_info *, pgoff_t); 1041 struct page *get_node_page_ra(struct page *, int); 1042 void sync_inode_page(struct dnode_of_data *); 1043 int sync_node_pages(struct f2fs_sb_info *, nid_t, struct writeback_control *); 1044 bool alloc_nid(struct f2fs_sb_info *, nid_t *); 1045 void alloc_nid_done(struct f2fs_sb_info *, nid_t); 1046 void alloc_nid_failed(struct f2fs_sb_info *, nid_t); 1047 void recover_node_page(struct f2fs_sb_info *, struct page *, 1048 struct f2fs_summary *, struct node_info *, block_t); 1049 int recover_inode_page(struct f2fs_sb_info *, struct page *); 1050 int restore_node_summary(struct f2fs_sb_info *, unsigned int, 1051 struct f2fs_summary_block *); 1052 void flush_nat_entries(struct f2fs_sb_info *); 1053 int build_node_manager(struct f2fs_sb_info *); 1054 void destroy_node_manager(struct f2fs_sb_info *); 1055 int __init create_node_manager_caches(void); 1056 void destroy_node_manager_caches(void); 1057 1058 /* 1059 * segment.c 1060 */ 1061 void f2fs_balance_fs(struct f2fs_sb_info *); 1062 void invalidate_blocks(struct f2fs_sb_info *, block_t); 1063 void clear_prefree_segments(struct f2fs_sb_info *); 1064 int npages_for_summary_flush(struct f2fs_sb_info *); 1065 void allocate_new_segments(struct f2fs_sb_info *); 1066 struct page *get_sum_page(struct f2fs_sb_info *, unsigned int); 1067 struct bio *f2fs_bio_alloc(struct block_device *, int); 1068 void f2fs_submit_bio(struct f2fs_sb_info *, enum page_type, bool); 1069 void f2fs_wait_on_page_writeback(struct page *, enum page_type, bool); 1070 void write_meta_page(struct f2fs_sb_info *, struct page *); 1071 void write_node_page(struct f2fs_sb_info *, struct page *, unsigned int, 1072 block_t, block_t *); 1073 void write_data_page(struct inode *, struct page *, struct dnode_of_data*, 1074 block_t, block_t *); 1075 void rewrite_data_page(struct f2fs_sb_info *, struct page *, block_t); 1076 void recover_data_page(struct f2fs_sb_info *, struct page *, 1077 struct f2fs_summary *, block_t, block_t); 1078 void rewrite_node_page(struct f2fs_sb_info *, struct page *, 1079 struct f2fs_summary *, block_t, block_t); 1080 void write_data_summaries(struct f2fs_sb_info *, block_t); 1081 void write_node_summaries(struct f2fs_sb_info *, block_t); 1082 int lookup_journal_in_cursum(struct f2fs_summary_block *, 1083 int, unsigned int, int); 1084 void flush_sit_entries(struct f2fs_sb_info *); 1085 int build_segment_manager(struct f2fs_sb_info *); 1086 void destroy_segment_manager(struct f2fs_sb_info *); 1087 1088 /* 1089 * checkpoint.c 1090 */ 1091 struct page *grab_meta_page(struct f2fs_sb_info *, pgoff_t); 1092 struct page *get_meta_page(struct f2fs_sb_info *, pgoff_t); 1093 long sync_meta_pages(struct f2fs_sb_info *, enum page_type, long); 1094 int acquire_orphan_inode(struct f2fs_sb_info *); 1095 void release_orphan_inode(struct f2fs_sb_info *); 1096 void add_orphan_inode(struct f2fs_sb_info *, nid_t); 1097 void remove_orphan_inode(struct f2fs_sb_info *, nid_t); 1098 int recover_orphan_inodes(struct f2fs_sb_info *); 1099 int get_valid_checkpoint(struct f2fs_sb_info *); 1100 void set_dirty_dir_page(struct inode *, struct page *); 1101 void add_dirty_dir_inode(struct inode *); 1102 void remove_dirty_dir_inode(struct inode *); 1103 struct inode *check_dirty_dir_inode(struct f2fs_sb_info *, nid_t); 1104 void sync_dirty_dir_inodes(struct f2fs_sb_info *); 1105 void write_checkpoint(struct f2fs_sb_info *, bool); 1106 void init_orphan_info(struct f2fs_sb_info *); 1107 int __init create_checkpoint_caches(void); 1108 void destroy_checkpoint_caches(void); 1109 1110 /* 1111 * data.c 1112 */ 1113 int reserve_new_block(struct dnode_of_data *); 1114 void update_extent_cache(block_t, struct dnode_of_data *); 1115 struct page *find_data_page(struct inode *, pgoff_t, bool); 1116 struct page *get_lock_data_page(struct inode *, pgoff_t); 1117 struct page *get_new_data_page(struct inode *, struct page *, pgoff_t, bool); 1118 int f2fs_readpage(struct f2fs_sb_info *, struct page *, block_t, int); 1119 int do_write_data_page(struct page *); 1120 1121 /* 1122 * gc.c 1123 */ 1124 int start_gc_thread(struct f2fs_sb_info *); 1125 void stop_gc_thread(struct f2fs_sb_info *); 1126 block_t start_bidx_of_node(unsigned int, struct f2fs_inode_info *); 1127 int f2fs_gc(struct f2fs_sb_info *); 1128 void build_gc_manager(struct f2fs_sb_info *); 1129 int __init create_gc_caches(void); 1130 void destroy_gc_caches(void); 1131 1132 /* 1133 * recovery.c 1134 */ 1135 int recover_fsync_data(struct f2fs_sb_info *); 1136 bool space_for_roll_forward(struct f2fs_sb_info *); 1137 1138 /* 1139 * debug.c 1140 */ 1141 #ifdef CONFIG_F2FS_STAT_FS 1142 struct f2fs_stat_info { 1143 struct list_head stat_list; 1144 struct f2fs_sb_info *sbi; 1145 struct mutex stat_lock; 1146 int all_area_segs, sit_area_segs, nat_area_segs, ssa_area_segs; 1147 int main_area_segs, main_area_sections, main_area_zones; 1148 int hit_ext, total_ext; 1149 int ndirty_node, ndirty_dent, ndirty_dirs, ndirty_meta; 1150 int nats, sits, fnids; 1151 int total_count, utilization; 1152 int bg_gc; 1153 unsigned int valid_count, valid_node_count, valid_inode_count; 1154 unsigned int bimodal, avg_vblocks; 1155 int util_free, util_valid, util_invalid; 1156 int rsvd_segs, overp_segs; 1157 int dirty_count, node_pages, meta_pages; 1158 int prefree_count, call_count; 1159 int tot_segs, node_segs, data_segs, free_segs, free_secs; 1160 int tot_blks, data_blks, node_blks; 1161 int curseg[NR_CURSEG_TYPE]; 1162 int cursec[NR_CURSEG_TYPE]; 1163 int curzone[NR_CURSEG_TYPE]; 1164 1165 unsigned int segment_count[2]; 1166 unsigned int block_count[2]; 1167 unsigned base_mem, cache_mem; 1168 }; 1169 1170 static inline struct f2fs_stat_info *F2FS_STAT(struct f2fs_sb_info *sbi) 1171 { 1172 return (struct f2fs_stat_info*)sbi->stat_info; 1173 } 1174 1175 #define stat_inc_call_count(si) ((si)->call_count++) 1176 1177 #define stat_inc_seg_count(sbi, type) \ 1178 do { \ 1179 struct f2fs_stat_info *si = F2FS_STAT(sbi); \ 1180 (si)->tot_segs++; \ 1181 if (type == SUM_TYPE_DATA) \ 1182 si->data_segs++; \ 1183 else \ 1184 si->node_segs++; \ 1185 } while (0) 1186 1187 #define stat_inc_tot_blk_count(si, blks) \ 1188 (si->tot_blks += (blks)) 1189 1190 #define stat_inc_data_blk_count(sbi, blks) \ 1191 do { \ 1192 struct f2fs_stat_info *si = F2FS_STAT(sbi); \ 1193 stat_inc_tot_blk_count(si, blks); \ 1194 si->data_blks += (blks); \ 1195 } while (0) 1196 1197 #define stat_inc_node_blk_count(sbi, blks) \ 1198 do { \ 1199 struct f2fs_stat_info *si = F2FS_STAT(sbi); \ 1200 stat_inc_tot_blk_count(si, blks); \ 1201 si->node_blks += (blks); \ 1202 } while (0) 1203 1204 int f2fs_build_stats(struct f2fs_sb_info *); 1205 void f2fs_destroy_stats(struct f2fs_sb_info *); 1206 void __init f2fs_create_root_stats(void); 1207 void f2fs_destroy_root_stats(void); 1208 #else 1209 #define stat_inc_call_count(si) 1210 #define stat_inc_seg_count(si, type) 1211 #define stat_inc_tot_blk_count(si, blks) 1212 #define stat_inc_data_blk_count(si, blks) 1213 #define stat_inc_node_blk_count(sbi, blks) 1214 1215 static inline int f2fs_build_stats(struct f2fs_sb_info *sbi) { return 0; } 1216 static inline void f2fs_destroy_stats(struct f2fs_sb_info *sbi) { } 1217 static inline void __init f2fs_create_root_stats(void) { } 1218 static inline void f2fs_destroy_root_stats(void) { } 1219 #endif 1220 1221 extern const struct file_operations f2fs_dir_operations; 1222 extern const struct file_operations f2fs_file_operations; 1223 extern const struct inode_operations f2fs_file_inode_operations; 1224 extern const struct address_space_operations f2fs_dblock_aops; 1225 extern const struct address_space_operations f2fs_node_aops; 1226 extern const struct address_space_operations f2fs_meta_aops; 1227 extern const struct inode_operations f2fs_dir_inode_operations; 1228 extern const struct inode_operations f2fs_symlink_inode_operations; 1229 extern const struct inode_operations f2fs_special_inode_operations; 1230 #endif 1231